Boards

There are 5 houses in 5 different colours.
In each house there lives a person with a different nationality.
Each person drinks a different type of beverage, smokes a different brand of cigar and keeps a different pet.
None of the persons have the same pet, smoke the same brand of cigar or drink the same beverage.

The question is: Who owns the fish?

Hints:
The Brit lives in the red house.
The Swede owns a dog.
The Dane drinks tea.
The green house is on the left of the white house.
The green house's owner drinks coffee.
The person who smokes Pall Mall keeps birds.
The owner of the yellow house smokes Dunhill.
The person living in the centre house drinks milk.
The Norwegian lives in the first house.
The person who smokes Blends lives next to the person who owns a cat
The person who keeps horses lives nextdoor to the person who smokes Dunhill.
The person that smokes Blue Master drinks beer.
The German smokes Prince.
The Norwegian lives next to the blue house.
The person that smokes Blends has a neighbor who drinks water.

It's the German. I worked it out by drawing a grid with nationality in the top row down to pet in the bottom. You keep filling in the spaces using the clues until only one space is left which will be in the 'pet' row if you've done it properly and that's where 'fish' goes.